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<head>
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    <title>Document</title>
    <style>
        div {
            text-align: center;
            height: 233px;
            height: 233px;
        }
    </style>
</head>

<body>
    <div></div>
    <table></table>
    <!-- div*3 -->
    <div></div>
    <div></div>
    <div></div>
    <!-- ul>li -->
    <ul>
        <li></li>
    </ul>
    <!-- div>span -->
    <div><span></span></div>
    <!-- div+p -->
    <div></div>
    <p></p>
    <!-- sapn.gray -->
    <sapn class="gray"></sapn>
    <!-- span#gray  -->
    <span id="gray"></span>
    <!-- div.demo$*5  -->
    <div class="demo1"></div>
    <div class="demo2"></div>
    <div class="demo3"></div>
    <div class="demo4"></div>
    <div class="demo5"></div>
    <!-- div{吴先生}   -->
    <div>吴先生</div>
    <!-- div{袁天罡}*5 -->
    <div>袁天罡</div>
    <div>袁天罡</div>
    <div>袁天罡</div>
    <div>袁天罡</div>
    <div>袁天罡</div>
    <!-- div{$}*5 -->
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
    <!-- vscode保存的时候自动格式化代码 -->
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</body>

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